Re: Sealing Mercury KD-4 two piece tank

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July 9, 2015 at 3:43 pm #19747
jeff-register
Participant

    Hi Louis!
    Yes I agree! The prep work is the key to a great seal. I changed some 1965 Cadillac heads & there wasn’t any exhaust manifold to head gaskets. The great machining sealed the mating surfaces good enough to have no leaks. The OMC gasoila is a good sealer too. The 518 works well for crankcase sealing too. Need to use the prep spray too. MUST be a clean flat surface before applying.